The Adventure of Charles Augustus Milverton

"The Adventure of Charles Augustus Milverton" is a Sherlock Holmes short story in which Holmes is hired by Lady Eva Blackwell to recover compromising letters from a notorious blackmailer named Milverton. Known as "the king of blackmailers," Milverton demands a large sum to return the letters, which hold the potential to cause a scandal. Holmes becomes determined to retrieve the letters by any means necessary, highlighting the blackmailer’s disregard for morality.